Systèmes de protection d'appareils électriques, comportant des lampes thermioniques,申请号FRD867357-传众专利搜索

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发明名称	Systèmes de protection d'appareils électriques, comportant des lampes thermioniques
摘要
申请公布号	FR867357(A)	申请公布日期	1941.10.20
申请号	FRD867357	申请日期	1940.10.02
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H03F1/54	主分类号	H03F1/54
代理机构		代理人
主权项
地址

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